Cornell Walking Robot Sets a Distance Record

The
Cornell Ranger is a walking robot with 4 legs and no knees. It's energy
efficient but not particularly so compared to other walking robots.
Ranger also shares one trait with the Energizer bunny that makes it
different from all other walking robots; it keeps going and going.
Ranger has previously walked 1km without human intervention. The
builders discovered that another walking robot was reported to have
walked 2.5km on a treadmill and a six-legged robot is supposed to have
walked 2km. So Cornell Ranger set out to beat them and has now set
a new record by walking over 9km - 45 laps non-stop around Cornell's
Barton Hall running track. The Cornell Ranger was developed by Andy
Ruina, Cornell professor of theoretical and applied mechanics and his
team of students. For all the technical details on Ranger's construction
see the technical report, Design
and Construction of the Cornell Ranger, a world record distance walking
robot (PDF format).